Lurking, deep down below where the other Flanimals are is a whole new land, just waiting to be studied and explored. This is Flanimals of the Deep. Here, the unique, complex and completely mental life form discovered in books one and two just gets even weirder. And more fantastic. So if you feel well enough, read on and prepare to be astounded all over again.
As all life started in the water, this book shows the greatest diversity of Flanimal life so far. From the lowly Mulgi and Flambois up to the more advanced creatures such as Bif Uddlers and Mulons.

The book also features a Splug but this is not worth reading about.